The secretary for Constitutional and Mainland Affairs is the head of the Constitutional and Mainland Affairs Bureau in Government of Hong Kong, which is responsible for promoting the Basic Law, constitutional affairs, electoral development, and coordinate liaison between the Hong Kong government and the relevant mainland China authorities, as well as to promote various regional cooperation initiatives between Hong Kong and the mainland. Prior to 2007, this post was known as the Secretary for Constitutional Affairs.

Michael Suen Ming-yeung who served as the acting Chief Secretary for Administration in 2005 and 2012 and as Secretary for Education of Hong Kong from 2007 to 2012.